It is by far the most compatible NES emulator currently available for the Macintosh, given that it supports full PPU emulation, full sound emulation (including VRCVI sound, used by some Japanese games), battery backed RAM, Famicom DiskSystem, VS Unisystem, and some 69 different mappers. In addition, RockNES includes lots of different video modes, as well as the ability to load and save your game at any stage. You can even record movies of gameplay!

• Updated RockNES to be in sync with Fx3's new version for Win32. Note that RockNES now uses cycle exact emulation, and is several orders of magnitude slower than previous releases. If you do not have a machine of at least 1 GHz, I strongly advise you to stick with the previous version of RockNES.